{"title":"GB\/T 9074.13-1988 Cross Recessed Hexagon Bolt with Indentation, Single Coil Lock Washer and Plain Washer Assemblies - Steel 4.8 - Zinc Cr3","description":"\u003ch1\u003eGB\/T 9074.13-1988 Cross Recessed Hexagon Bolt with Indentation, Single Coil Lock Washer and Plain Washer Assemblies — Low Carbon Steel 4.8, Zinc Cr3\u003c\/h1\u003e\n\n\u003cp\u003eFULLERKREG supplies GB\/T 9074.13-1988 low carbon steel class 4.8 SEMS screws with trivalent zinc (Zinc Cr3) plating — pre-assembled three-piece fastener assemblies combining a cross recessed hexagon bolt, a single coil spring lock washer, and a plain washer into one captive unit. The economical class 4.8 grade with RoHS-compliant Zinc Cr3 coating is the standard choice for light-duty assembly, sheet metal, electrical enclosures, and general-purpose industrial applications where moderate clamping force and environmental compliance are required.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhat Are GB9074.13 Cross Recessed Hex SEMS Screws?\u003c\/h2\u003e\n\n\u003cp\u003eGB\/T 9074.13-1988 defines a three-piece pre-assembled fastener (SEMS) consisting of:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGB29.2\u003c\/strong\u003e — Cross recessed hexagon head bolt (Phillips drive, hex head)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGB9074.24\u003c\/strong\u003e — Plain washer (assembly-grade flat washer)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGB9074.26\u003c\/strong\u003e — Single coil spring lock washer (assembly-grade spring washer)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe three components are permanently captivated onto the bolt shank before thread rolling. After threading, the outer thread diameter exceeds the inner diameter of the plain washer, making the assembly permanently inseparable. This eliminates loose washers on the assembly line and dramatically reduces installation time and error.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAssembly formula:\u003c\/strong\u003e GB9074.13 = GB29.2 + GB9074.24 + GB9074.26\u003c\/p\u003e\n\n\u003cp\u003eThe washer stack order from bolt head outward is: \u003cstrong\u003ePlain Washer → Spring Lock Washer → Bolt Head\u003c\/strong\u003e (the plain washer sits closest to the workpiece surface).\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eBenefits of Using GB9074.13 Cross Recessed Hex SEMS Screws\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eNo loose parts\u003c\/strong\u003e — washers are permanently captivated; no risk of dropped or missing washers during assembly\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eFaster installation\u003c\/strong\u003e — one-piece handling replaces three separate components; ideal for automated and manual assembly lines\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eCorrect washer sequence guaranteed\u003c\/strong\u003e — plain washer always contacts the workpiece; spring washer always contacts the bolt head flange\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eCost-effective class 4.8\u003c\/strong\u003e — low carbon steel provides adequate strength for light-to-medium duty joints at the most competitive price point; ideal for high-volume, cost-sensitive applications\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eVibration resistance\u003c\/strong\u003e — the coil spring lock washer provides reliable anti-loosening performance under moderate dynamic loads\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eDual drive flexibility\u003c\/strong\u003e — cross recessed (Phillips) drive on a hex head allows both manual screwdriver and power tool \/ wrench tightening\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eRoHS-compliant Zinc Cr3 finish\u003c\/strong\u003e — trivalent chromium zinc plating replaces hexavalent Cr6+ coating; meets EU ELV, RoHS, and REACH directives; silver-grey appearance with good corrosion resistance\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eReduced inventory complexity\u003c\/strong\u003e — one SKU replaces three separate fastener SKUs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eMaterial \u0026amp; Finish\u003c\/h2\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eProperty\u003c\/th\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMaterial\u003c\/td\u003e\n      \u003ctd\u003eLow Carbon Steel (A3 \/ Q235)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSurface Finish\u003c\/td\u003e\n      \u003ctd\u003eZinc Cr3 (Trivalent Chromium Zinc Plating)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePlating Appearance\u003c\/td\u003e\n      \u003ctd\u003eSilver-grey\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePlating Thickness\u003c\/td\u003e\n      \u003ctd\u003eTypically 5–8 µm\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSalt Spray Resistance\u003c\/td\u003e\n      \u003ctd\u003e≥ 72 hours (white rust per ISO 9227)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProperty Class\u003c\/td\u003e\n      \u003ctd\u003e4.8\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTensile Strength\u003c\/td\u003e\n      \u003ctd\u003e≥ 420 MPa\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eYield Strength (0.2% proof)\u003c\/td\u003e\n      \u003ctd\u003e≥ 340 MPa\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eRoHS \/ ELV Compliant\u003c\/td\u003e\n      \u003ctd\u003eYes — Cr3 (trivalent), no hexavalent chromium (Cr6+)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eREACH Compliant\u003c\/td\u003e\n      \u003ctd\u003eYes\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eClass 4.8 vs Class 8.8 — Choosing the Right Grade\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eProperty\u003c\/th\u003e\n      \u003cth\u003eClass 4.8\u003c\/th\u003e\n      \u003cth\u003eClass 8.8\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMaterial\u003c\/td\u003e\n      \u003ctd\u003eLow Carbon Steel\u003c\/td\u003e\n      \u003ctd\u003eMedium Carbon Steel (Q\u0026amp;T)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTensile Strength\u003c\/td\u003e\n      \u003ctd\u003e≥ 420 MPa\u003c\/td\u003e\n      \u003ctd\u003e≥ 800 MPa\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eYield Strength\u003c\/td\u003e\n      \u003ctd\u003e≥ 340 MPa\u003c\/td\u003e\n      \u003ctd\u003e≥ 640 MPa\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTypical Use\u003c\/td\u003e\n      \u003ctd\u003eLight-duty, sheet metal, enclosures\u003c\/td\u003e\n      \u003ctd\u003eStructural, machinery, automotive\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCost\u003c\/td\u003e\n      \u003ctd\u003eMost economical\u003c\/td\u003e\n      \u003ctd\u003eHigher\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eHeat Treatment\u003c\/td\u003e\n      \u003ctd\u003eNone required\u003c\/td\u003e\n      \u003ctd\u003eQuenched \u0026amp; tempered\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eZinc Cr3 vs Traditional Zinc Plating\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eProperty\u003c\/th\u003e\n      \u003cth\u003eZinc Yellow (Cr6+)\u003c\/th\u003e\n      \u003cth\u003eZinc Cr3 (Trivalent)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eChromate Type\u003c\/td\u003e\n      \u003ctd\u003eHexavalent Cr6+\u003c\/td\u003e\n      \u003ctd\u003eTrivalent Cr3+\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eRoHS Compliant\u003c\/td\u003e\n      \u003ctd\u003eNo\u003c\/td\u003e\n      \u003ctd\u003eYes\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eEU ELV \/ REACH\u003c\/td\u003e\n      \u003ctd\u003eRestricted\u003c\/td\u003e\n      \u003ctd\u003eCompliant\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eAppearance\u003c\/td\u003e\n      \u003ctd\u003eYellow \/ iridescent\u003c\/td\u003e\n      \u003ctd\u003eSilver-grey\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCorrosion Resistance\u003c\/td\u003e\n      \u003ctd\u003eGood\u003c\/td\u003e\n      \u003ctd\u003eGood (≥ 72 h salt spray)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eAutomotive \/ Electronics Use\u003c\/td\u003e\n      \u003ctd\u003ePhased out\u003c\/td\u003e\n      \u003ctd\u003eStandard requirement\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDimensions of Pre-Assembled Washers in GB9074.13 Hex Head SEMS Screws\u003c\/h2\u003e\n\n\u003cp\u003eWasher dimensions conform to \u003cstrong\u003eGB9074.24\u003c\/strong\u003e (plain washer) and \u003cstrong\u003eGB9074.26\u003c\/strong\u003e (spring lock washer). All dimensions in millimeters (mm).\u003c\/p\u003e\n\n\u003ch3\u003ePlain Washer Dimensions (GB9074.24)\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eThread Size\u003c\/th\u003e\n      \u003cth\u003eInner Dia. d₁ (mm)\u003c\/th\u003e\n      \u003cth\u003eOuter Dia. d₂ (mm)\u003c\/th\u003e\n      \u003cth\u003eThickness h (mm)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003e4.3\u003c\/td\u003e\n\u003ctd\u003e9.0\u003c\/td\u003e\n\u003ctd\u003e0.8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e5.3\u003c\/td\u003e\n\u003ctd\u003e10.0\u003c\/td\u003e\n\u003ctd\u003e1.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e6.4\u003c\/td\u003e\n\u003ctd\u003e12.0\u003c\/td\u003e\n\u003ctd\u003e1.6\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e8.4\u003c\/td\u003e\n\u003ctd\u003e16.0\u003c\/td\u003e\n\u003ctd\u003e1.6\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e10.5\u003c\/td\u003e\n\u003ctd\u003e20.0\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eSpring Lock Washer Dimensions (GB9074.26)\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eThread Size\u003c\/th\u003e\n      \u003cth\u003eInner Dia. d₁ (mm)\u003c\/th\u003e\n      \u003cth\u003eOuter Dia. d₂ (mm)\u003c\/th\u003e\n      \u003cth\u003eThickness s (mm)\u003c\/th\u003e\n      \u003cth\u003eWidth b (mm)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003e4.1\u003c\/td\u003e\n\u003ctd\u003e7.1\u003c\/td\u003e\n\u003ctd\u003e0.9\u003c\/td\u003e\n\u003ctd\u003e1.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e5.1\u003c\/td\u003e\n\u003ctd\u003e8.7\u003c\/td\u003e\n\u003ctd\u003e1.2\u003c\/td\u003e\n\u003ctd\u003e1.8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e6.1\u003c\/td\u003e\n\u003ctd\u003e10.2\u003c\/td\u003e\n\u003ctd\u003e1.6\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e8.1\u003c\/td\u003e\n\u003ctd\u003e13.0\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e10.2\u003c\/td\u003e\n\u003ctd\u003e16.2\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDimensional Data — GB9074.13 SEMS Screw (Low Carbon Steel 4.8, Zinc Cr3)\u003c\/h2\u003e\n\n\u003cp\u003eAll dimensions in millimeters (mm). Bolt head dimensions per GB29.2. Nominal lengths per standard series.\u003c\/p\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eThread Size\u003c\/th\u003e\n      \u003cth\u003ePitch (mm)\u003c\/th\u003e\n      \u003cth\u003eHead Width Across Flats s (mm)\u003c\/th\u003e\n      \u003cth\u003eHead Width Across Corners e (mm)\u003c\/th\u003e\n      \u003cth\u003eHead Height k (mm)\u003c\/th\u003e\n      \u003cth\u003eCross Recess Depth (mm)\u003c\/th\u003e\n      \u003cth\u003eMin. Grip Length (mm)\u003c\/th\u003e\n      \u003cth\u003eNominal Length Range L (mm)\u003c\/th\u003e\n      \u003cth\u003eEst. Unit Weight (g\/pc) — @L16\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003e0.7\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e7.66\u003c\/td\u003e\n\u003ctd\u003e2.8\u003c\/td\u003e\n\u003ctd\u003e1.8\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003e10–40\u003c\/td\u003e\n\u003ctd\u003e≈ 1.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e0.8\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e8.79\u003c\/td\u003e\n\u003ctd\u003e3.5\u003c\/td\u003e\n\u003ctd\u003e2.1\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e10–50\u003c\/td\u003e\n\u003ctd\u003e≈ 2.8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e1.0\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003e11.05\u003c\/td\u003e\n\u003ctd\u003e4.0\u003c\/td\u003e\n\u003ctd\u003e2.4\u003c\/td\u003e\n\u003ctd\u003e14\u003c\/td\u003e\n\u003ctd\u003e12–60\u003c\/td\u003e\n\u003ctd\u003e≈ 4.8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e1.25\u003c\/td\u003e\n\u003ctd\u003e13\u003c\/td\u003e\n\u003ctd\u003e14.38\u003c\/td\u003e\n\u003ctd\u003e5.3\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e16–80\u003c\/td\u003e\n\u003ctd\u003e≈ 10.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e1.5\u003c\/td\u003e\n\u003ctd\u003e16\u003c\/td\u003e\n\u003ctd\u003e17.77\u003c\/td\u003e\n\u003ctd\u003e6.4\u003c\/td\u003e\n\u003ctd\u003e3.6\u003c\/td\u003e\n\u003ctd\u003e22\u003c\/td\u003e\n\u003ctd\u003e20–100\u003c\/td\u003e\n\u003ctd\u003e≈ 19.0\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Unit weights are approximate reference values for L=16mm. Actual weight varies with nominal length. Contact FULLERKREG for precise weight data for your specific length requirement.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eProduct Gallery\u003c\/h2\u003e\n\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:8px;\"\u003e \u003c\/td\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:8px;\"\u003e \u003c\/td\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:8px;\"\u003e \u003c\/td\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:8px;\"\u003e \u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\n\u003cp\u003eGB9074.13 low carbon steel 4.8 Zinc Cr3 SEMS screws are the standard choice for high-volume, cost-sensitive assembly where moderate strength and RoHS compliance are required:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e⚡ \u003cstrong\u003eElectrical enclosures \u0026amp; control panels\u003c\/strong\u003e — securing panel covers, cable trays, DIN rail brackets, and junction box lids; the most common application for class 4.8 SEMS\u003c\/li\u003e\n  \u003cli\u003e🖥️ \u003cstrong\u003eConsumer electronics \u0026amp; appliances\u003c\/strong\u003e — chassis assembly, sheet metal housings, white goods; RoHS-compliant Zinc Cr3 finish meets regulatory requirements\u003c\/li\u003e\n  \u003cli\u003e🏭 \u003cstrong\u003eLight industrial machinery\u003c\/strong\u003e — guards, covers, access panels, and non-structural brackets where high clamping force is not required\u003c\/li\u003e\n  \u003cli\u003e🚗 \u003cstrong\u003eAutomotive interior \u0026amp; trim\u003c\/strong\u003e — non-structural interior panels, trim clips, and bracket assemblies requiring ELV-compliant plating\u003c\/li\u003e\n  \u003cli\u003e🛠️ \u003cstrong\u003eHVAC \u0026amp; sheet metal fabrication\u003c\/strong\u003e — ductwork flanges, access door hinges, equipment mounting on thin sheet metal\u003c\/li\u003e\n  \u003cli\u003e🔧 \u003cstrong\u003eGeneral-purpose assembly\u003c\/strong\u003e — wherever pre-assembled washers eliminate loose-part handling and cost efficiency is the primary driver\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhy Choose FULLERKREG GB9074.13 Steel 4.8 Zinc Cr3 SEMS Screws?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e🏭 \u003cstrong\u003eDirect manufacturer\u003c\/strong\u003e — produced in-house to GB\/T 9074.13-1988 standard with full dimensional traceability\u003c\/li\u003e\n  \u003cli\u003e📦 \u003cstrong\u003eBulk wholesale supply\u003c\/strong\u003e — flexible MOQ, competitive pricing for OEM and MRO procurement; class 4.8 offers the best value per piece\u003c\/li\u003e\n  \u003cli\u003e📐 \u003cstrong\u003eStrict dimensional control\u003c\/strong\u003e — 100% thread gauge inspection; washer captivation verified per standard\u003c\/li\u003e\n  \u003cli\u003e📋 \u003cstrong\u003eCompliance documentation available\u003c\/strong\u003e — material test reports, RoHS certificates, and REACH declarations on request\u003c\/li\u003e\n  \u003cli\u003e🚀 \u003cstrong\u003eFast lead times\u003c\/strong\u003e — standard sizes held in stock; custom lengths available with short lead times\u003c\/li\u003e\n  \u003cli\u003e🌍 \u003cstrong\u003eGlobal export experience\u003c\/strong\u003e — export packaging, ISPM-15 compliant crating, and international logistics support\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\u003cstrong\u003eStandard:\u003c\/strong\u003e GB\/T 9074.13-1988 | \u003cstrong\u003eMaterial:\u003c\/strong\u003e Low Carbon Steel (A3 \/ Q235) | \u003cstrong\u003eFinish:\u003c\/strong\u003e Zinc Cr3 (Trivalent Zinc) | \u003cstrong\u003eProperty Class:\u003c\/strong\u003e 4.8 | \u003cstrong\u003eBrand:\u003c\/strong\u003e FULLERKREG\u003c\/p\u003e","products":[],"url":"https:\/\/www.fullerkr.com\/collections\/gb9074-13-4-8.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}